湖南大学学报（自然科学版）Issue(1)：21-26,6.
考虑索端刚臂的斜拉桥空间拉索非线性分析
Non-linear Analysis of Spatial Stay Cable with Rigid Arms of Cable-stayed Bridge
摘要
Abstract
In response to the problem of rigid link of anchorage point,which occurs to spatial cable fixed on the girder and the tower of cable-stayed bridge,on the basis of tangent stiffness matrix of nonlin-ear spatial truss element by differential method,and according to the characteristics of the forced rigid arm without deformation but rigid motion,the relationships between the total amount and increment of the dis-placement and the end force of ends of rigid arms in global coordinate system were presented by treating rigid arm as the spatial vector and employing its finite rotation formula and differential method.Then,the explicit expressions of nonlinear tangent stiffness matrix of spatial stay cable 3-D truss element with rigid arms on both ends were obtained.A finite element program based on the algorithm was developed to ana-lyze the geometric nonlinear behaviors of cable-stayed bridge.Three examples,including spatial trussed structure with or without rigid arms and a cable-stayed bridge in construction process,were employed to perform spatial geometrical nonlinear analysis.The results show that the new algorithm can solve the rigid link of anchorage point completely,and it provides a powerful tool for refined geometrical nonlinear analy-sis of cable-stayed bridge.关键词
空间斜拉索/刚臂/几何非线性/切线刚度矩阵/空间矢量有限转动Key words
spatial cable/rigid arms/geometric nonlinear/tangent stiffness matrix/finite rotation of space vector分类
建筑与水利引用本文复制引用
邓继华,邵旭东,张阳,彭建新..考虑索端刚臂的斜拉桥空间拉索非线性分析[J].湖南大学学报（自然科学版）,2014,(1):21-26,6.基金项目
国家自然科学基金资助项目(51008037) （51008037）
